To communicate between cells, many multicellular animals use

• nerve signals and respiratory gases

• nerve signals and hormones

• bones and muscles

• respiratory gases and hormones

Structures adapted to convert stimuli into nerve impulses are known as

• effectors

• receptors

• muscles

• glands

A specialized neuron ending that detects changes in pressure in the skin is functioning as

• a terminal branch

• a synapse

• a receptor

• an effector

Which one of the following statements best describes a function of the entire structure shown in the diagram?

• It releases chemicals involved in cellular communication.

• It synthesizes a hormone involved in the control of blood sugar level.

• It controls the replication of genetic material.

• It unites with an egg cell during fertilization.

Tags

NGSS.MS-LS1-2

Which one of the following statements concerning hormones is true?

• Hormones are produced by every cell of an organism.

• Hormones are produced only by the pituitary gland.

• Hormones produced by endocrine glands travel through ducts to various organs.

• Hormones produced in one part of the body may affect the action of another part of the body.

Tags

NGSS.MS-LS1-3

Into what organ system do endocrine glands secrete hormones?

• circulatory

• digestive

• nervous

• reproductive

The reproductive cycle of a human is usually regulated by

• gametes

• immune responses

• hormones

• natural selection

Tags

NGSS.HS-LS1-3

What hormone lowers blood sugar levels by increasing the rate of entry of glucose into the cells?

• adrenalin

• parathormone

• follicle-stimulating hormone

• insulin

Tags

NGSS.HS-LS1-3

The maintenance of homeostasis in the body is most directly related to

• cellular communication

• cycling of energy

• recombination of chromosomes

• aging of the organism

Tags

NGSS.HS-LS1-3

An increase in the level of hormone A causes an increase in the level of hormone B. The increase in the level of hormone B then causes a decrease in the level of hormone A. This process is an example of

• a feedback mechanism

• a disruption in cellular coordination

• a failure to maintain homeostasis

• the breakdown of chemicals

Tags

NGSS.HS-LS1-3