The circulatory system helps to maintain homeostasis by interacting with the

(1) nervous system and transporting chemicals produced by nerve cells from one cell to another.

(2) respiratory system and producing oxygen for gas exchange

(3) digestive system by removing undigested food from the stomach

(4) excretory system in helping to regulate body temperature through sweating

After a cookie has been eaten and digested, sugar molecules enter the bloodstream by the process of

(1) active transport

(3) excretion

(2) diffusion

(4) cellular respiration

All of these organs interact to help carry out the

(1) removal of waste products

(2) digestion of food

(3) production of hormones

(4) coordination of body movements

What is the function of a capillary?

The transfer of specific molecules through cell membranes is an important factor in the process of

(1) cytoplasmic flow

(3) homeostasis

(2) mitotic division

(4) nuclear transfer

Which structure in a cell corresponds with the function of the human lungs?

(1) nucleus

(2) vacuole

(3) cell membrane

(4) mitochondria

One reason a fish that lives in the ocean may have trouble living in a freshwater lake is that

(1) there are more carnivores in freshwater habitats

(2) salt water holds more dissolved nitrogen than fresh water

(3) more photosynthesis occurs in fresh water than in salt water

(4) water concentration in the fish is affected by salt levels in its environment

1. A few bacteria are placed in a nutrient solution. After several hours, thousands of bacteria are present. Which life activities are primarily responsible for this?

(1) digestion and movement

(2) digestion and reproduction

(3) circulation and respiration

(4) excertion and coordination

2. Mitochondria are organelles that _____.

(1) are necessary for the process of diffusion to take place

(2) are found in the nucleus of some cells

(3) initiate cell division in living cells

(4) contain respiratory wnzymes

3. Most of the enzymes found in the mitochondria are involved in the reactions associated with _____.

(1) extracting energy from nutrients

(2) storing energy in nutrients

(3) DNA production

(4) protein synthesis

What part of the mouth contains taste receptors?

What role do sensory receptors play in feedback loops to maintain homeostasis?

A) Interpret stimuli

B) Detect stimuli

C) Respond to stimuli

D) Reverse the effects of stimuli

What blood disorder is characterized by a lack of oxygen reaching the body's cells?

Most of the enzymes found in the mitochondria are involved in the reactions associated with

(1) extracting energy from nutrients

(2) storing energy in nutrients

(3) DNA production

(4) protein synthesis

Which letter in the diagram indicates a cell structure that functions primarily in the synthesis of protein?

8. in the following diagram of a plant cell, the small circles represent water molecules. Which statement best describes the behavior of

‘most of these water molecules?

(1) They move from region A to region B.

(2) They move from region B to region A.

(3) They do not move in either direction.

(4) Their overall movement is equal in both direstiont: