Describe the structure of the cardiovascular system. Include the internal and external factors influencing heart rate and its impact on the heart's functioning.

What will be an ideal response?


The cardiovascular system comprises the heart, blood vessels, and blood and acts as the transport system of the body. Blood carries oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs. Blood also carries nutrients from the digestive tract to the individual cells so that the cells may extract nutrients for growth and energy. The heart functions as a pump, and its pumping action causes the blood to circulate throughout the body. The heart performs its internal functions through regular rhythmic phases of contraction and relaxation known as the cardiac cycle. A number of external factors also influence the rate at which the heart contracts and relaxes. During exercise, emotional excitement, or stress, the heart speeds up, and the cardiac cycle is completed in a shorter time.

Psychology

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Being an advocate for dying persons means

a. acting on their behalf to address their concerns b. empowering dying persons to act for themselves c. speaking for dying persons when they are unable to speak for themselves d. all of these e. none of these

Psychology

An example of a manualized psychotherapy with empirical evidence for its efficacy is

A. exposure plus response prevention for bulimia. B. exposure plus response prevention for obsessive compulsive disorder. C. dialectical behavior therapy for depression. D. dialectical behavior therapy for antisocial personality disorder.

Psychology

Joshua loves making his friends laugh, and he performs in the local civic theatre. Joshua is likely high in introversion.

Answer the following statement true (T) or false (F)

Psychology

In newborns, the sense of smell is

a. not developed at all. c. fair. b. very primitive. d. well-developed.

Psychology