Question

Which of the following statements is not true?

Select one:

a. In late adulthood, people start to lose nerve cells.

b. In late adulthood, people show slowed nerve impulse transmission.

c. In late adulthood, there is a decrease in nerve conduction velocity.

d. All of the above are true.

Question 2

Not yet answered

Marked out of 1.00

Flag question

Question text

Using Figure 1, the neural processes that convey incoming messages toward the neuron cell body are indicated by the letter _____.

Select one:

a. A

b. C

c. B

d. H

Question 3

Not yet answered

Marked out of 1.00

Flag question

Question text

Control of temperature, endocrine activity, metabolism, and thirst are functions associated with _______________.

Select one:

a. the medulla oblongata

b. the cerebellum

c. the hypothalamus

d. the cerebrum

Question 4

Not yet answered

Marked out of 1.00

Flag question

Question text

The auditory ossicle called the "anvil" is also called the _______________.

Select one:

a. malleus

b. incus

c. stapes

d. cochlea

Question 5

Not yet answered

Marked out of 1.00

Flag question

Question text

An action potential is caused by an influx of theses ions into the cell:

Select one:

a. potassium

b. sodium

c. calcium

d. both potassium and sodium

Question 6

Not yet answered

Marked out of 1.00

Flag question

Question text

The peripheral nervous system consists of _______________.

Select one:

a. spinal nerves only

b. the brain only

c. cranial nerves only

d. the spinal nerves and cranial nerves

Question 7

Not yet answered

Marked out of 1.00

Flag question

Question text

Which of the following statements is not true?

Select one:

a. An infant has few reflexes at birth. They develop later in childhood.

b. Constant stimulation of the nervous system is important for health growth and development of an infant.

c. By age 7, the brain has reached 90% of the adult size.

d. By age 12, the brain has reached adult size.

Question 8

Not yet answered

Marked out of 1.00

Flag question

Question text

What is the transparent central anterior portion of the sclera through which the light enters the eye?

Select one:

a. choroid

b. cornea

c. iris

d. pupil

Question 9

Not yet answered

Marked out of 1.00

Flag question

Question text

What disease has the common name "polio" and is a viral inflammation of gray matter in the spinal cord?

Select one:

a. poliomyelitis

b. stroke

c. meningitis

d. cerebral palsy

Question 10

Not yet answered

Marked out of 1.00

Flag question

Question text

The autonomic nervous system is also referred to as the _________ system.

Select one:

a. voluntary

b. involuntary

c. central

d. peripheral

Answer 1

I hope you will rate my answer positively --

Q3. The correct option is c, hypothalamus.the hypothalamus is a small region of the brain ,located near pituitary gland .it play a important function in regulating body temperature,thirst , metabolism.cerebrum is important in sensory and neural functions ,also control voluntary activities.cerebellum also help in voluntary movement regulations, like posture, balance, speech, etc, medulla oblangta helps to control involuntary activities.

Q4. The correct option is b, incus or anvil is the middle Auditory ossicle.it is suspended medial to the malleus and lateral to the stapes and joins these ossicles together with synovial joints.

Q5. b, sodium is right one, short lived depolarisation of a region of plasma membrane during action potential is caused by influx of Na ions which is massive through Na gated channels.in this action potential is at peak.when action potential passes than potassium channels stay open a bit and let positive ion to pass to neuron the cell become temporally hyperpolarizes.clacium release when action potential reaches terminal it than activates voltage gated calcium channel opens .

Q6.d,is right option ,it has both spinal and cranial nerve.31pair of spinal nerves and 12 pairs of cranial nerve present .cranial nerve emerge from brain, spinal nerve emerge from spinal cord.cranial nerves has both sensory and motor function, spinal nerve carry only motor impulses.

Q8. b is correct one, cornea is a transparent central anterior portion of the sclera in which light enters.choroid is middle part that contains pigment which prevent scattering of light, iris is pigmented portion of eye that has rounded opening, when iris contract or dilate than it changes size of pupil.

Q9.correct option is a, poliomyelitis or also called gray matter myelitis is caused by infection of anterior horn of spinal cord by enterovirus.

Q10. The correct option is b,d, involuntary nervous system, or visceral. The autonomic nervous system is part of the peripheral nervous system.

Thankyou.