Physiology 1 Flashcards
Describe the mechanistic view.
The process of how events happen. (i.e. their cause and effect.)
Describe the teleogic view
why events happen- explains purpose starting with end
shivering elevates a low body temperature
What is the equivalent for flow in terms of pressure and resistance?
Change in P / Resistance
What does the elasticity model state?
In order for biologic structures to changes in length require pressure gradient and chemical signals can alter this property.
What two pressures are involved in the balancing of forces model?
Osmotic and hydrostatic
What is the moste effective mechanism for long range signalling?
Endocrine signalling.
How is the inside and outside of a cell set up with respect to charge, Na, and K? Also, describe the actions of the Na-K-ATPase.
The Na-K-ATPase pumps out 3 Na and imports 2 K, so inside is more negative.
Preganglion acetylcholine acts on..
nicotinic receptors
Postganglion parasympathetic- acetylcholine acts on [ ] sympathetic- norepinephrine acts on the [ ]
muscarinic receptors ; adrenergic receptors
Pulmonary circulation and the systemic circulation are arranged in series.
Systemic organs represent individual circulations arranged in parallel. (T/F)
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What does Mean Arterial Pressure equal?
CO x TPR. Needs to be maintained at 100 mmHg for
adequate brain blood flow, it’s a controlled variable
Changes in rate of ventilation homeostatically regulate gas partial pressures & pH of blood (T/F)
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Where does reabsorbtion occur in the kidneys?
In the Tubules
What is the role of estrogen and progesterone?
Estrogens- promotes uterine proliferation, triggers ovulation through LH, and secondary sex characteristics
Progesterone- required for implantation and inhibits uterine motility
Main role of endocrine system?
Generates reproduction, maintains water and
electrolyte balance, and regulates metabolism and growth.
