Vocabulary Quiz: Feedback Loops

What is the process by which organisms maintain a relatively balanced internal environment?

• Feedback loop

• Homeostasis

• Thermoregulation

• Cellular Respiration

Answer explanation

Homeostasis is the process by which organisms regulate their internal environment to maintain stability despite external changes. It involves various feedback mechanisms to ensure optimal functioning.

Tags

NGSS.HS-LS1-3

Which term describes a circular process within an organism that helps to maintain a balanced internal environment?

• Neuron

• Effector

• Feedback loop

• Receptor

Answer explanation

A feedback loop is a circular process that helps maintain homeostasis in an organism by regulating internal conditions. It involves receptors detecting changes, effectors responding, and the system adjusting accordingly.

Tags

NGSS.HS-LS1-3

What is an organ or cell that acts in response to a stimulus called?

• Gland

• Effector

• Hormone

• Receptor

Answer explanation

An effector is a cell or organ that responds to a stimulus, carrying out the response. Glands secrete substances, hormones are signaling molecules, and receptors detect stimuli, but only effectors execute the response.

Tags

NGSS.HS-LS1-3

What is a change in an organism's surroundings that causes the organism to react?

• Response

• Stimulus

• Nerve impulse

• Hormone

Answer explanation

A stimulus is any change in an organism's surroundings that triggers a response. It is the correct term for the factor that causes an organism to react, distinguishing it from other options like nerve impulses or hormones.

What is a reaction to a stimulus known as?

• Effector

• Response

• Receptor

• Neuron

Answer explanation

A reaction to a stimulus is called a 'response'. It is the body's way of reacting to changes in the environment, while 'effector', 'receptor', and 'neuron' refer to different components of the nervous system.

Tags

NGSS.MS-LS1-8

What is the basic building block of the nervous system?

• Hormone

• Neuron

• Gland

• Receptor

Answer explanation

The basic building block of the nervous system is the neuron. Neurons are specialized cells that transmit information throughout the body, making them essential for all nervous system functions.

What are chemical messengers manufactured by glands that affect other parts of the body?

• Neurons

• Hormones

• Receptors

• Stimuli

Answer explanation

Hormones are chemical messengers produced by glands that travel through the bloodstream to target organs, influencing various bodily functions. Neurons transmit signals, receptors detect signals, and stimuli are external factors, not messengers.

What is an organ that produces and releases chemicals and hormones into the bloodstream?

• Neuron

• Gland

• Effector

• Receptor

Answer explanation

A gland is an organ that produces and releases chemicals and hormones directly into the bloodstream, playing a crucial role in regulating various bodily functions. Neurons, effectors, and receptors do not perform this function.

Tags

NGSS.HS-LS1-3

What is an electric signal sent between nerve cells called?

• Hormone

• Nerve impulse

• Stimulus

• Response

Answer explanation

An electric signal sent between nerve cells is called a nerve impulse. This term specifically refers to the rapid transmission of information along neurons, distinguishing it from hormones, stimuli, and responses.

What is the body's "slow" chemical communication system?

• Nervous System

• Endocrine system

• Cellular Respiration

• Thermoregulation

Answer explanation

The body's 'slow' chemical communication system is the endocrine system, which uses hormones to regulate various functions over longer periods, unlike the nervous system that communicates quickly through electrical signals.