Endocrine System Overview

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What is the main function of hormones in the body?

To transport oxygen in the bloodstream

To regulate total body metabolism, growth, and reproduction (correct)

To digest food in the stomach

To provide structural support to organs

Why are endocrine glands commonly referred to as ductless glands?

Due to their role in oxygen transport

Because they have ducts that carry hormones to target tissues

Because they produce enzymes for digestion

Due to the diffusion of hormones directly into the bloodstream (correct)

How do hormones reach their target tissues and organs?

By diffusion from capillaries into the bloodstream (correct)

By direct nerve connections

Through the lymphatic system

Through the digestive system

What is the role of the Autonomic Nervous System (ANS) in maintaining homeostasis?

To control rapid changes in the body Signup and view all the answers

How does endocrine control differ from Autonomic Nervous System (ANS) control?

Endocrine control is slower and more precise than ANS control Signup and view all the answers

Why can't a sharp distinction always be made between the nervous and endocrine systems based on the chemicals they release?

Because some chemical messengers are released in response to neural stimuli Signup and view all the answers

Where are the receptors for lipophilic hormones typically located?

In the cytoplasm and nucleus Signup and view all the answers

What type of hormones do not enter the target cells, instead bind to receptors on the plasma membrane?

Polypeptides Signup and view all the answers

Which component is essential for target cells to respond to hormonal signals?

Specific receptor proteins Signup and view all the answers

Where do hydrophobic hormones bind to exert their effects?

Nucleus of the cell Signup and view all the answers

Which type of hormone typically binds to receptors on the plasma membrane?

Glycoproteins Signup and view all the answers

What is the location of receptor proteins for lipophilic hormones?

In the nucleus and cytoplasm Signup and view all the answers

What is the role of pulsatile secretion in preventing desensitization of hormones?

To decrease the number of receptor proteins in target cells Signup and view all the answers

How does negative feedback control hormone secretion?

By reversing or negating the stimulus through a feedback mechanism Signup and view all the answers

Which hormone is NOT secreted by the Anterior Pituitary Gland?

Antidiuretic hormone (ADH) Signup and view all the answers

What is the function of Positive feedback in hormonal regulation?

To amplify the stimulus and increase hormone release Signup and view all the answers

Which gland secretes Melanocyte Stimulating Hormone (MSH)?

Anterior Pituitary Gland Signup and view all the answers

What is the role of Oxytocin in hormonal regulation?

To complete a particular process and cease the stimulus Signup and view all the answers

Where are the receptors of steroid hormones situated?

Cytoplasm Signup and view all the answers

What type of receptors are situated in the nucleus of the cell?

Receptors of thyroid hormones Signup and view all the answers

Which statement about hormone receptors is true?

Each receptor is specific for one single hormone. Signup and view all the answers

In which area are the receptors of protein hormones situated?

Cell membrane Signup and view all the answers

What type of receptors are present in the cell membrane?

Receptors of protein hormones Signup and view all the answers

Which type of effect occurs when 2 or more hormones work together to produce a particular result?

Synergistic Effect Signup and view all the answers