In this discussion, you will examine ways in which muscles can be weakened or strengthened.

Objectives

• Describe the gross and microscopic anatomy of skeletal muscle.
• Describe the anatomical differences between skeletal, smooth, and cardiac muscles.
• Explain the current concept of muscle contraction based on three factors: neuroelectrical, chemical, and energy sources.
• Define muscle tone.
• Compare isotonic and isometric contractions.

Step 1: Respond to the following:

In addition to experiencing disorders and diseases that can affect muscles, people can strengthen or weaken their muscles in various ways. Certain diseases, for example, can weaken muscles; in contrast, people can develop routines that strengthen their muscles.

• Describe two ways in which people can, perhaps unintentionally, weaken their muscles. What are two ways in which people can, intentionally or unintentionally, strengthen various muscles within their body?
• Search a reputable source to find an online article that discusses ways of strengthening muscles. Summarize the article in a sentence or two.
• Explain whether you agree or disagree with what the article suggests and why.

Which of the following involves a skeletal muscle (whole muscle)?

1. Treppe
2. Multiple wave summation
3. Isotonic contraction

Consider the following events and choose the one that occurs last

1. Na+ ions diffuse into the skeletal muscle cells
2. ACH binds to receptor sites on Na+ ion channels
3. Membrane permeability to Na+ ions increased

The sphere of hydration is greater for

1. Na+
2. H+
3. He+
4. H2O

Which ectodermal cells use socium, Na+, as a component of depolarization?

1. Heart muscle
2. Smooth muscle
3. Integument
4. Motor neurons

Match the best response with the following statements:

Mesoderm derived à

Association with choroid plexus à

AP propagation in the PNS à

Extracellular fluid regulation à

Macrophages à

CNS myelination à

CSF production à

Blood brain barrier à

Neurolemmocytes à

Phagocytosis à

1. Ependymal cells
2. Microglial cells
3. Schwann cells
4. Astrocytes
5. Oligodendrocytes

Compare and contrast taste and smell. For example, why is it that taste appears to have a small set of basic qualities, while smell does not? You should explain the basic theories underlying the perception of each, including how specificity coding vs. population coding apply to each. You should also include in your discussion how the two combine to produce flavor.

Localization of seen objects to some degree naturally falls out from representing the real world as an image on the retina, and subsequent retinotopic mapping. There is no direct analog for sound, and you we do a reasonable job of localizing sounds as well. How do we localize sounds? Your answer should include both monaural and binaural methods, different methods for high vs. low frequencies, and should mention the sorts of confusions (e.g. front-back, top-down) that we may make and why we might make them.

name all of the hormones produces by the pancreas and describe the hormone’s main purposes

Phagocytic cells ingest and sequester pathogens into a structure called a “phagolysosome” which contains singlet oxygen and superoxide radicals (among other molecules). Explain how this immune system strategy works against pathogens. What type of bacteria would you expect to be most vulnerable?

what is the correct way of doing a anatomy lab report?

Compare the similarities and differences between amylopectin and chitin.

please i need the answers not the explaining

Osmosis and Osmolarity

1. Osmosis is the movement of _________ from __________ to __________. The osmolarity of a solution is defined as the _____________. The normal osmolarity of body fluids is _________. Iso-osmotic solutions have an osmolarity of _______; hypoosmotic solutions have an osmolarity ________ and hyperosmotic solutions have an osmolarity of ________.
2. _________ solutions cause water to enter cells which may cause __________; _________ cause water to leave cells which may cause __________; and _________ has no net effect of water movement across the cell membrane

Vesicular Transport

1. __________ is used to move materials into the cell. This includes _________ and _________. The process that expels materials from the cell is called _______.

What are some of the factors that differentiate between motor unit types? Check all that apply

-soma size

-actin and myosin

-myosin ATPase type

-Mitochondrial content

-Presence of troponin and topomyosin