Endocrine introduction

Multiple Choice

What is the term for the process by which the internal environment of the body is kept constant despite changes in the external environment?

• Homeostasis

• Metabolism

• Osmosis

• Photosynthesis

Multiple Select

Which of the following are types of hormones secreted by the endocrine glands?

• Proteins

• Amines or peptides

• Steroids

• Carbohydrates

Multiple Choice

Each hormone in the body acts like a key that fits a specific lock. In this analogy, what does the 'lock' represent?

• Target organ

• Bloodstream

• Nerve impulse

• Enzyme

Multiple Choice

Which hormone is released by the brain to stimulate the thyroid to release thyroxine?

• Thyroid Stimulating Hormone (TSH)

• Insulin

• Oestrogen

• Follicle Stimulating Hormone (FSH)

Multiple Select

Which of the following are steps in the negative feedback loop involving FSH and oestrogen?

• Anterior pituitary gland releases FSH

• FSH tells ovaries to develop follicles

• Follicles make oestrogen

• Oestrogen increases FSH production

Multiple Choice

What is the main purpose of negative feedback in hormone regulation?

• To slow down or stop hormone production when enough is present

• To increase hormone production indefinitely

• To amplify the response of hormone release

• To prevent any hormone from being produced

Multiple Choice

How does positive feedback differ from negative feedback in hormone regulation?

• Positive feedback amplifies hormone production, while negative feedback stops it when enough is made.

• Positive feedback stops hormone production, while negative feedback amplifies it.

• Both feedback types stop hormone production.

• Both feedback types amplify hormone production.

Multiple Choice

What is the role of oxytocin during birth?

• It causes the uterus to contract, pushing the fetus against the cervix.

• It increases blood sugar levels.

• It helps in digestion of food.

• It reduces blood pressure.

Multiple Select

Which of the following are steps in the positive feedback loop during birth?

• Pituitary gland releases oxytocin

• Uterus pushes fetus against cervix

• Fetus contracts

• Antibodies attach to hormones

Open Ended

Explain how positive feedback is involved in the process of birth, using the information from the images.

Multiple Choice

Which of the following best describes the difference between a bioassay and an immunoassay?

• A bioassay checks what the hormone does, while an immunoassay checks how much hormone is present.

• A bioassay checks how much hormone is present, while an immunoassay checks what the hormone does.

• Both bioassay and immunoassay check what the hormone does.

• Both bioassay and immunoassay check how much hormone is present.

Open Ended

What is one question you still have about positive and negative feedback in the endocrine system, or is there something you would like to learn more about?

Multiple Choice

The endocrine system uses feedback mechanisms to regulate hormone levels. Which of the following best describes negative feedback?

• A process where the output reduces the original effect of the stimulus.

• A process where the output enhances the original effect of the stimulus.

• A process that does not affect the original stimulus.

• A process that only occurs in the nervous system.