Biology - Integumentary System - MCAT Practice Questions
What are the three main layers of the skin, from outer to inner? Epidermis, Dermis, Hypodermis
The majority of the human body's surface area is covered by which classification of skin? Thin skin
Where is thick skin exclusively found on the human body? Palms of the hands and soles of the feet
Which layer of the epidermis is only found in thick skin? Stratum Lucidum
Langerhans cells, a type of dendritic cell found in the skin, perform what immune function? Presenting antigens to T cells
The pigment Melanin is produced by which specialized cell type? Melanocytes
Melanin protects the skin from DNA damage caused by which specific type of radiation? UV radiation
The dermis is composed of which two primary layers? Papillary layer and Reticular layer
Merkel cells are mechanoreceptors in the skin essential for the sensation of: Light touch
Which type of sensory receptor found in the skin is responsible for the sensation of light touch? Meissner's corpuscle
Ruffini endings are responsible for detecting which specific sensation in the skin? The stretch of your skin
The nerve endings responsible for sensitivity to vibration and deep pressure are the: Pacinian corpuscles
The innermost layer of the skin, the Hypodermis (subcutaneous layer), is primarily composed of which type of tissue, serving as the storage site of most body fat? Adipose tissue
Which layer is the inner layer of the thin skin epidermis, resting on the basement membrane? Stratum Basale
Free nerve endings in the skin can detect all of the following EXCEPT: Vibration (primarily Pacinian corpuscles)