8 Flashcards
What is the speed of sound in air at 20°C?
340 m/s
The speed of sound varies with temperature; it decreases in colder temperatures due to slower particle energy.
Why does sound travel faster in solids compared to air?
Particles are more dense and can collide quicker
The density of particles in solids facilitates faster sound transmission.
What is the formula to calculate the distance sound travels in an echo?
d = 2 x D
Where D is the distance to the reflecting surface.
What is the human hearing range in Hertz (Hz)?
20 - 20,000 Hz
This range indicates the frequencies audible to the average human.
What does decibel (dB) measure?
How loud a sound is
Decibels quantify sound intensity.
Fill in the blank: The unit for measuring frequency of a wave is _______.
Hertz (Hz)
Hertz is a standard unit of frequency.
What is the role of the penis in male reproduction?
Inserts into the female vagina to transfer sperm
This is essential for fertilization.
What does the epididymis do?
Stores sperm
The epididymis is a mass of tubes connected to the testis.
What is the function of the prostate gland?
Adds nutrients (glucose) to sperm to form semen
The prostate gland plays a key role in male reproductive health.
What is the scrotum?
Sac that holds testis
It helps regulate the temperature of the testis for optimal sperm production.
What do the seminal vesicles do?
Add nutrients to sperm to form semen
Seminal vesicles are crucial for providing energy to sperm.
What is the function of the urethra in males?
Links testis to the outside
The urethra serves as a passage for sperm as well as urine.
What is the role of the ovaries in female reproduction?
Produce ova (eggs)
Ovaries are key reproductive organs in females.
What is the function of the fallopian tubes?
Carries ovum to the uterus
Movement is aided by tiny cilia on the tube walls.
What is the uterus’s primary role?
Where the fetus develops
The uterus provides a nurturing environment for the developing embryo.
What separates the vagina from the uterus?
Cervix
The cervix acts as a barrier and connector between the two structures.
What is the main purpose of the vagina in female reproduction?
Sperm is deposited here during sexual intercourse
The vagina serves as the birth canal during delivery.
What is a zygote?
The fertilized egg
A zygote forms when a sperm fertilizes an ovum.
What happens during fertilization?
The fusion of sperm and ovum
This process initiates the development of a new organism.
What are the components of sperm?
- Enzyme (acrosome)
- Nucleus
- Mitochondria
- Flagellum (tail)
These components are crucial for the sperm’s function and mobility.
What hormone is responsible for stimulating sperm production?
FSH (Follicle-Stimulating Hormone)
FSH plays a critical role in male reproductive health.
True or False: The menstrual cycle is exclusive to humans.
False
Many mammals experience a menstrual cycle, though the specifics can vary.
