The basic receptors in the internal ear are the (a) utricles, (b) saccules, (c) hair cells, (d) supporting cells, (e) ampullae.

Verified step by step guidance

1. Step 1: Understand the question. The question is asking about the basic receptors in the internal ear. Receptors are cells or groups of cells that receive signals from the environment or within the body.
2. Step 2: Review the options. The options provided are utricles, saccules, hair cells, supporting cells, and ampullae. These are all parts of the inner ear, but not all of them are receptors.
3. Step 3: Recall the function of each part. Utricles and saccules are involved in balance and spatial orientation, but they are not the receptors themselves. Supporting cells provide structure and support, but they do not receive signals. Ampullae are part of the semicircular canals and are involved in balance, but again, they are not the receptors themselves.
4. Step 4: Identify the correct answer. Hair cells are the actual receptors in the inner ear. They convert mechanical stimuli (like sound waves or head movements) into electrical signals that can be interpreted by the brain.
5. Step 5: Confirm your answer. Hair cells are the correct answer because they are the basic receptors in the internal ear that receive and convert stimuli into signals that can be interpreted by the brain.

Key Concepts

Hair Cells

Hair cells are specialized sensory cells located in the inner ear that play a crucial role in the auditory and vestibular systems. They convert mechanical stimuli from sound waves or head movements into electrical signals, which are then transmitted to the brain. These cells are essential for hearing and balance, making them the primary receptors in the internal ear.

Utricles and Saccules

Utricles and saccules are otolithic organs in the vestibular system of the inner ear that detect linear acceleration and the position of the head relative to gravity. They contain a gel-like substance with tiny calcium carbonate crystals called otoliths, which shift in response to movement, stimulating hair cells. While important for balance, they are not the primary receptors for sound.

Ampullae

Ampullae are structures located at the base of the semicircular canals in the inner ear, containing the cupula and hair cells. They are responsible for detecting rotational movements of the head. Although they play a significant role in balance, they are not the basic receptors for sound, which are primarily the hair cells.