Exam 1: Introduction to Physiology and Homeostasis

The plasma surrounds and bathes all of the body's cells.

The pancreas is part of the endocrine system and secretes the hormone insulin, which allows most body cells to absorb glucose from the blood.A lack of insulin can result in hyperglycemia (high blood glucose), which can adversely affect one's health.Describe the roles of the digestive system, circulatory system, and endocrine systems in maintaining glucose homeostasis when a person eats a sugary meal.

Evaporation of sweat cooling the body is an example of

To sustain life, the internal environment must be maintained in an absolutely unchanging state.

Someone sees a burglar breaking into your house, so they call 911 and the dispatcher sends police officers to your house.Relating this scenario to a feedback loop that maintains homeostasis in your body, indicate the role of each component using the following answer code. a.Effector b.Message sent from sensor c.Sensor d.Message sent from integrator e.Controlled variable f.Integrator -Police officers

Use the following physiological event represents: -Doing warm-up exercises prior to a sporting event in order to prepare one's muscles for the event.

Glands are formed during embryonic development by pockets of epithelial tissue that dip inward from the surface.

Endocrine glands secrete hormones through ducts into the blood.

____________________ cells are specialized to send electrical signals.

The way in which the nervous system affects a person's heart rate is an example of intrinsic control since both the nervous system and the heart are inside the body.

Which of the following is a feedforward phenomenon?

-Which number identifies the system that serves as the site of nutrient and waste exchange between cells and the interstitial fluid?

The external environment is found outside cells but inside the body.

Most homeostatic mechanisms operate on the principle of positive feedback.

The body cells are in direct contact with, and make life-sustaining exchanges with, the ____________________.