In an isometric contraction of a skeletal muscle,

(a) the tension in the muscle increases.
(b) movement occurs.
(c) no movement occurs.
(d) both a and c occur.


(d) both a and c occur.

Biology & Microbiology

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Multiple sclerosis (MS) is a progressive inflammatory disease of the central nervous system characterized by intermittent damage to myelin (called demyelination) caused by the destruction of specialized cells (oligodendrocytes) that form the substance. Given what you know about the function of myelin, predict the consequences associated with its progressive loss.

_____ Sensory abnormalities (e.g., tingling, numbness, itching, tightness, burning, shooting pain) and motor coordination loss. _____ Racing heartbeat, hyperactivity and nausea. _____ Low levels of potassium in the blood (hypokalemia). _____ Balance and equilibrium abnormalities (e.g., dizziness, vertigo, uncoordinated movements, tremor).

Biology & Microbiology

The pH of seawater is important to living organisms because:

a. it can affect the functioning of enzymes. b. it can interfere with metabolism. c. it can affect growth. d. All the above.

Biology & Microbiology

Lymph nodes aid in the destruction of bacteria and viruses

Indicate whether the statement is true or false

Biology & Microbiology

2 steps of a cell cycle

What will be an ideal response?

Biology & Microbiology