Ch 31

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_____ is the connective tissue specialized for transport. - Bone - Blood - Adipose tissue - Muscle tissue - Cartilage

Blood is specialized for the transport of substances such as nutrients, wastes, and gases.

What happens if homeostasis is not maintained? - Organisms function better. - Cells lose the ability to carry out normal functions. - Cellular metabolism is unchanged. - Organisms stop using negative feedback loops. - Cells begin dividing uncontrollably.

Cells lose the ability to carry out normal functions.

How does connective tissue differ from the other three major tissue types? - Connective tissue often consists of relatively few cells embedded in an extracellular matrix. - Connective tissue consists of contractile proteins. - Connective tissue consists of cells capable of transmitting electrical impulses. - There are three types of connective tissue. - Connective tissue is found lining body surfaces.

Connective tissue often consists of relatively few cells embedded in an extracellular matrix. This describes many connective tissues, such as loose connective tissue.

Which of these describes loose connective tissue? - It is a loose weave of fibers that functions as a packing material. - It is composed of many fibers that connect bone to bone and muscle to bone. - It is a rigid material that provides structural support. - It transports nutrients and gases from one part of the body to another. - It plays a role in padding, insulation, and energy storage.

It is a loose weave of fibers that functions as a packing material. Loose connective tissue is a packing material that serves, for example, to hold organs in place.

Cartilage is found _____. - surrounding organs such as the kidneys - in the heart - at the ends of bones such as the femur - covering the surface of your body - connecting one bone to another

at the ends of bones such as the femur The ends of long bones, such as the femur, have a cartilage cap.

Which of the following is a correct match of cell type with structure? - nerve cell ... closely joined - skin cell ... has a large volume - intestinal cell ... closely joined - muscle cell ... has proteins that slide back and forth - skin cell ... has long extensions

muscle cell ... has proteins that slide back and forth These proteins help muscles to contract.

Which of the following is an example of a positive feedback loop? - a person altering her breathing rate to keep blood pH between 7.35 and 7.45 - the kidney retaining water when the organism becomes dehydrated - a hummingbird maintaining a constant internal body temperature - stress altering the normal menstrual cycle, which delays menstruation, which causes more stress

stress altering the normal menstrual cycle, which delays menstruation, which causes more stress

One biological example of a positive feedback system is: - blood pH levels. - water balance. - the cascade of events involving oxytocin during childbirth. - temperature regulation.

the cascade of events involving oxytocin during childbirth.

In humans, the body needs to maintain oxygen levels within narrow homeostatic ranges. If the blood oxygen level drops below that range, the body responds by: - using negative feedback loops to return the oxygen level to normal. - using negative feedback loops to further lower the oxygen level. - using positive feedback to further lower the oxygen level. - setting this lower oxygen level as the new normal. - using positive feedback to raise the oxygen level.

using negative feedback loops to return the oxygen level to normal.