Question

question 3 of 10
in what way does the cardiovascular system affect the use of muscles?
a. the cardiovascular system carries muscle tissue around the body.
b. the cardiovascular system sends messages across synapses.
c. the cardiovascular system provides calcium ions.
d. the cardiovascular system provides the oxygen to make atp.

Explanation:

The cardiovascular system's main function is to circulate blood. Blood carries oxygen. Muscles need oxygen to produce ATP (adenosine triphosphate) through cellular respiration (like aerobic respiration). ATP is the energy currency for muscle contraction.

• Option A is wrong as the cardiovascular system doesn't carry muscle tissue around the body. Muscle tissue is in fixed locations (attached to bones etc., except for some involuntary muscles).
• Option B is incorrect because it's the nervous system (neurons) that sends messages across synapses (the gap between neurons or between a neuron and a muscle cell in the case of neuromuscular junctions).
• Option C is false. Calcium ions for muscle contraction mainly come from the sarcoplasmic reticulum (in muscle cells) and are regulated by the nervous system's signal (not provided by the cardiovascular system in the context of immediate muscle - contraction - related calcium needs).

Answer:

D. The cardiovascular system provides the oxygen to make ATP.