Speculate on what seem to be the major selective pressures acting upon the worldwide population of human beings at this time. Would the selective pressures be different from human populations that had no technology beyond the ability to make fire?

Healthcare research often involves the use of patients or human subjects. Research and read about the Tuskegee Syphilis Experiment. What are your thoughts? Describe the use of research, using human subjects, and potential ethical issues.

It appears at time that the human resources function is a tool for the corporation to manage benefit packages and, risk aversion, and the like. Should the human resources function be more integrated into the communication process and relationships among the stakeholders within the organization?

The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.92 m, a width of 39.0 cm and a length of 28.5 cm. Calculate the power emitted by the human body. Tries 0/12 What is the wavelength of the peak in the spectral distribution for this temperature? Tries 0/12 Fortunately our environment radiates too. The human body absorbs this radiation with an absorbance of 97.0 percent, so we don't lose our internal energy so quickly. How much power do we absorb when we are in a room where the temperature is 26.0 °C? Tries 0/12 How much energy does our body lose in one second?

22. The pyruvate dehydrogenase complex provides a transition between glycolysis and the citric
acid cycle. Which co-factors are considered stoichiometric and which are considered
catalytic?
23. Which conditions exert a negative influence (reduce the activity) of pyruvate dehydrogenase?
24. What is the critical role for lipoic acid in the pyruvate dehydrogenase complex?
25. Central to the function of the citric acid cycle are two decarboxylation reactions. What are
these decarboxylation reaction?
26. Your friend tells you of a celebrity touting a new “miracle diet drug” which targets succinyl
CoA synthetase. The drug acts by stabilizing or locking in the succinyl-phosphate
intermediate state. Why would this drug cause serious side effects?

Use the following list of the steps of cellular respiration to answer questions 28-33:

1. Glycolysis

2. The Intermediate Step

3. Krebs Cycle

4. Oxidative Phosphorylation

28. Which stage makes the most NADH and FADH2?

a. 1

b. 2

c. 3

d. 4

29. Which stage(s) uses NADH and FADH2 that was made in the other steps?

a. 1 only

b. 1 & 2

c. 1, 2, & 3

d. 4 only

e. 1, 2, 3, & 4

30. Which stage makes the most ATP?

a. 1

b. 2

c. 3

d. 4

31. Which stage(s) takes place in the mitochondria?

a. 1 only

b. 1 & 2

c. 1, 2, & 3

d. 4 only

e. 2, 3, & 4

32. Which stage(s) can happen without oxygen?

a. 1 only

b. 1 & 2

c. 1, 2, & 3

d. 4 only

e. 1, 2, 3, & 4

33. If glucose is broken down without oxygen (anaerobically), how many net ATP are made per glucose?

a. 2 ATP

b. 4 ATP

c. 24 ATP

d. 32 ATP

e. 36 ATP

Which of the following produces ATP:

Select one or more:

a. glycolysis

b. transition reaction

c. citric acid cycle

d. electron transport chain

Question 2

The stomach contains 3 layers of skeletal muscle.

Select one:

True

False

Question 3

When blood enters the heart, it always first enters an atrium and then continues to a ventricle.

Select one:

True

False

Question 4

Which of the following are considered to be part of the "innate immune system"?

Select one or more:

a. fever

b. stomach acids

c. interferons

d. T lymphocytes

e. pores developing in the wall of a bactrium, causing it to burst

Question 5

The atrioventricular valve prevents blood from backflowing from the atrium into the ventricle.

Select one:

True

False

Question 6

Which part of the conduction system of the heart is considered to be the heart's pacemaker, i.e. it maintains the steady beat of the heart.

Select one:

a. SA node

b. AV node

c. Purkinje fibers

d. Bundle of His

Question 7

Platelets are pieces of the megakaryocyte cell.

Select one:

True

False

Question 8

Homeostasis is a mechanism that the body uses to balance its internal environment. There are 3 components to the homeostatic mechanism: receptor, control center and effector.

Select one:

True

False

Question 9

The following is the order of blood flow through the chambers of the heart: inferior and superior vena cava --> right atrium --> right ventricle --> pulmonary vein --> lungs --> pulmonary artery --> left atrium --> left ventricle --> aorta

Select one:

True

False

Question 10

The molecules that help the body idetify cells as "self" (i.e. not foreign) are the:

Select one:

a. antigens

b. memory cells

c. major histocompatibility complex markers

d. macrophages

Question 11

Which white blood cell is the first to arrive to the site if an infection?

Select one:

a. monocyte

b. neutrophil

c. lymphocyte

d. eosinophil

Question 12

ATP is required for troponin to move off of the myosin binding sites of the tropomyosin molecule.

Select one:

True

False

Question 13

Rigor mortis refers to the stiffening of the body when a person dies. The reason the body stiffens is because, in the contraction cycle, ATP is required for muscle to relax.

Select one:

True

False

Question 14

The main molecule that makes up the "walls" of the cell is the ________ molecule.

Select one:

a. carbohydrate

b. water

c. phospholipid

d. triglyceride

Question 15

Capillaries can be as wide as one red blood cell thick.

Select one:

True

False

Question 16

Which part of the mitochondria is said to be the site of ATP synthesis:

Select one:

a. cristae

b. outer membrane

c. cytoplasm

Question 17

This type of bone cell is responsible for building new bone tissue. It is the:

Select one:

a. osteoblast

b. osteocyte

c. osteoclast

Question 18

An autoimmune disorder is when the person's immune system has trouble distinguishing between selfand non-self. Their immune system attacks the person's own cells because it thinks that those cells are foreign when they actually aren't.

Select one:

True

False

Question 19

Where in adults does blood cell production occur?

Select one:

a. in the marrow within the medullary cavity

b. in the yellow bone marrow

c. in the marrow within the spongy bone tissue

d. in the red bone marrow

e. both c and d

Question 20

Mitochondrial diseases that are inherited are more likely to be inherited from the mother than the father.

Select one:

True

False

Question 21

Polysaccharides are made when monosaccharides are bound together through:

Select one:

a. condensation synthesis

b. hydrolysis

c. hydrogen bonding

d. an ionic bond

Question 22

Which part of the hemoglobin molecule does the oxygen bind to?

Select one:

a. globulin

b. heme disc

c. iron

d. alpha chain

e. beta chain

Question 23

What is true about asbestos:

Select one or more:

a. it causes the lysosomes to burst and release enzymes into the entire cell

b. teh lysosome cannot break down asbestos with its digestive enzymes

c. asbestos can increase your risk for lung cancer

d. it causes impaired respiratory function

e. all of the above

Question 24

Which of the following is a function of bones?

Select one:

a. it supports soft tissues

b. it allows us to move

c. it protects us, such as the skull protecting the brain

d. it can store essential minerals that the body needs to survive

e. all of the above

Question 25

The hair root can be found in which layer of the skin?

Select one:

a. epidermis

b. dermis

c. subcutaneous layer

Question 26

The use of anabolic steroids can cause the user to have a heart attack.

Select one:

True

False

Question 27

Not yet answered

Which part of the neuron would you likely find the mitochondria?

Select one:

a. axon

b. dendrite

c. nucleus

d. cell body

Question 28

Leukocytes is the technical term for a white blood cell.

Select one:

True

False

Question 29

When evaluating askin growth to see if it is melanoma, we look at 4 things: asymmetry, undefined borders, multiple mottled colors and grwoths larger than half a centimeter.

Select one:

True

False

Question 30

Where does blood get deoxygenated

Select one:

a. the heart

b. the lungs

c. tissues all over the body

Question 31

The cytotoxic T cell plays an integral role in the antibody-mediated response.

Select one:

True

False

Question 32

When new bone tissue is built, the type of cell that ultimately becomes embedded within the bone matrix is the:

Select one:

a. osteoblast

b. osteocyte

c. osteoclast

Many organic molecules act as acids and bases and can exist in an acid or base form. For each molecule, match the following acid or base with its' conjugate base or acid

1. CH₃NH₂

2. CH₃CH₂O^-

3. CH₃CH₂N(CH₃)₃⁺

4. CH₃CH₂OCH₃

5. (CH₃)₃NH⁺

a.CH₃NH₃⁺

b. (CH₃)₂NH₂⁺

c. CH₃CH₂O^-

d. CH₃CH₂OH

e.(CH₃)₃N

f. CH₃CH₂OOH

g. none of these

Why do unsaturated fats remain liquid at room temperature?

Their rigid structure prevents their interaction with adjacent molecules to form a solid.

The glycerol in unsaturated fats keeps the fatty acids fluid and prevents formation of solid form.

Their structure causes kinks in their conformation, which prevents close packing into a solid form.

The glycerol in unsaturated fats causes kinks in its structure, which prevents it from forming a solid.

Find the pH of each mixture of acids.

Part A

7.0×10⁻² M in HNO3 and 0.165 M in HC7H5O2

Part B

1.5×10⁻² M in HBr and 2.0×10⁻² M in HClO4

Part C

9.5×10⁻² M in HF and 0.230 M in HC6H5O

Part D

0.110 M in formic acid and 4.5×10⁻² M in hypochlorous acid