Answer:
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
Explanation:
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Answer: D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert.
Explanation:
The myocardial contractility is ability of the heart muscles to contract. This is achieved by the forces which develop between the contracting muscles caused by the filaments of actin and myosin.
The degree of binding of the muscle filaments dependents upon the calcium ion concentration. These actions are controlled in vivo by the sympathetic nervous system. It is driven by the release of the catecholamine, which is a process which determines the calcium ion concentration inside the cytosol of the muscles of the heart.
Spiritual health, openness and adaptability, fulfilling relationships, and altruism toward others are traits of self actualization. Pay doesn't always correspond to self-actualization.
<h3>What is a psychosocial component that has the potential to affect mental health, quizlet?</h3>
Life experiences—particularly crises and losses—are regarded as having a psychosocial impact on mental health.
<h3>Which of the following best describes secondary prevention in community mental health?</h3>
For instance, by screening individuals for depression , a more serious outcome may be prevented by early intervention. hotlines and crisis centers are examples of secondary prevention, when the disorder already present but can be mitigated before it worsens.
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Answer:
True
Explanation:
Pacemaker cells, unlike other neurons in the body, can depolarized themselves (and therefore can fire action potentials) without the need of an external innervation of the autonomic nervous system.
Each class of pacemaker cells has its own intrinsic rate.
For example, sinoatrial node rate is 60-100 bpm (the normal heart frequency).
The atrioventricular node is also part of the electrical conduction system of the heart. When the sinoatrial node fails, atrioventricular node takes the lead (40-60 bpm).
